<template>
	<view class="calendar-box">
		<!-- <view class="top">
			<view>
				<h4>已连续签到 <span> {{checkinDays}} </span> 天</h4>
				<p v-if="isIntegral">今日获得+{{integral}}积分</p>
			</view>
			<view class="rig">
				<span v-if="supplementary" @click="shift">补签</span>
			</view>
		</view> -->
		<view class="miss_box">
			<view class="month">
				<!-- <view class="prv" @click="lastMonth">
					<span v-show="prv">上月</span>
				</view> -->
				<view style="font-size: 24px; color: #222; padding-left: 20px;">{{month}}月</view>
				<div @click="toPointsDetail">
					<span>积分明细 > </span>
				</div>
				<!-- <view class="prv" @click="nextMonth">
					<span v-show="next">下月</span>
				</view> -->
				<picker
					v-if="checkDate"
					class="picker"
					mode="date"
					fields="month"
					@change="changeDate"
				/>
			</view>
			<view class="week">
				<view
					:style="'color:' + (weeks==weeked?bgweek:'') + ';'"
					v-for="weeks in weekArr"
					:key="weeks">
					{{weeks}}
				</view>
			</view>
			<view class="day">
				<view
					:class="[{'checkday':days.date==''},{'choose':days.date==localDate || days.flag }]"
					:style="'background:'+(days.date==localDate || days.flag ? bgday:'')+';'" v-for="(days,index) in dayArr" :key="index"
					@click="signToday(days,index)">
					{{days.day}}
					<view :class="[{'circle':days.flag},{'repair':days.day<day},{'sign':days.day==day}]"></view>
				</view>
			</view>
		</view>
		<view class="but">
			<!-- <button :disabled='thisMonth == month ? false : true'  :style="'background:'+(thisMonth == month ? bgday : signin_but_bg)+';'" @click="daySign(dayArr[aheadDay + day - 1])">签到</button> -->
			<!-- <button :disabled='thisMonth == month ? false : true'  :style="'background: ' + (is_day_signin ? signin_but_bg : (thisMonth == month ? bgday : signin_but_bg)) + ';'" @click="daySign(dayArr[aheadDay + day - 1])">签到</button> -->
		</view>
	</view>
</template>

<script>
	export default {
		props: {
			lang: {
				type: String,
				default: 'zh'
			},
			type: {
				type: String,
				default: 'calendar'
			},
			checkDate: {
				type: Boolean,
				default: false
			},
			bgweek: {
				type: String,
				default: '#0095F8'
			},
			bgday: {
				type: String,
				default: '#0095F8'
			},
			// 不能签到时的按钮颜色
			signin_but_bg: {
				type: String,
				default: '#909399'
			},
			supplementary: {
				type: Boolean,
				default: true
			},
			already: {
				type: Array
			},
			checkinDays: {
				type: [Number, String],
				default: 0
			},
			integral: {
				type: [Number, String],
				default: 0
			},
			isIntegral: {
				type: Boolean,
				default: false
			}
		},
		watch: {
			already: {
				handler(v) {
				  this.getAlready();
				},
				immediate: true, // 第一次赋值时触发
				deep: true // 深度监听
			}
		},
		data() {
			return {
				weeked: '', // 今天周几
				dayArr: [], // 当前月每日
				localDate: '', // 今天日期
				day: new Date().getDate(), // 当前日
				year: new Date().getFullYear(), // 当前年
				month: new Date().getMonth() + 1, // 当前月
				weekArr: ['周日', '周一', '周二', '周三', '周四', '周五', '周六'], // 每周
				aheadDay: 0,	// 前方空白天数数量
				thisMonth: new Date().getMonth() + 1,
				// 2023年4月4日11:50:03
				prv: true,
				next: true,
				// 判断今天是否已经签到
				is_day_signin: false
			}
		},
		mounted() {
			let that = this;
			// 初始日期
			that.initDate();
			// 今天日期
			that.localDate = that.year + '-' + that.formatNum(that.month) + '-' + that.formatNum(that.day);
			// 中英切换
			if (that.lang != 'zh') that.weekArr = ['Sun', 'Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat'];
			// 今天周几
			that.weeked = that.weekArr[new Date().getDay()];
			// 签到功能
			if (that.type != 'calendar') {
				for (let i in that.dayArr) {
					that.$set(that.dayArr[i], 'flag', false);
				}
			}
		},
		methods: {
			// 渲染已经签到的日期
			getAlready() {
				for (let i in this.dayArr) {
					if(this.already.indexOf(new Date(this.dayArr[i].date).getTime()) == -1) {
						this.$set(this.dayArr[i], 'flag', false);
					}else {
						this.$set(this.dayArr[i], 'flag', true);
						if(this.dayArr[i].date == this.localDate) {
							// 今天已经签到了
							this.is_day_signin = true;
						}
					}
				}
			},
			// 补签触发的方法
			shift() {
				this.$emit('shift')
			},
			toPointsDetail () {
				this.$emit('toPointsDetail', this.year, this.month)
			},
			// 选择年月
			changeDate(e) {
				let that = this;
				that.year = parseInt(e.detail.value.split('-')[0]);
				that.month = parseInt(e.detail.value.split('-')[1]);
				that.initDate();
			},
			// 今日签到
			daySign(obj) {
				// 今天日期加上前方空白日期数量
				let index = this.aheadDay + this.day - 1
				if(this.dayArr[index].flag) {
					// 已经签到后不能签到
					return false
				}
				this.$set(this.dayArr[index], 'flag', true);
				this.$emit('change', obj.date);
				this.is_day_signin = true;
				uni.showToast({
					title: '已签到',
					icon: 'success'
				});
			},
			// 点击补签
			signToday(obj, index) {
				let that = this;
				// 指定签到类型可访问
				if (that.type == 'calendar') return;
				// 限制本月可进行签到
				if ((new Date().getMonth() + 1) != parseInt(obj.date.split('-')[1])) return;
				// 禁用非本月点击签到且限制签到日期小于本日
				if (obj.date != '' && obj.day < that.day) {
					// 开启已签到提醒
					if (that.dayArr[index].flag) {
						uni.showToast({
							title: '已签到',
							icon: 'none'
						});
					} else {
						if(that.day > obj.day && !that.supplementary) {
							return
						}
						console.log(obj.day);
						uni.showToast({
							title: that.day > obj.day ? '补签成功' : '签到成功',
							icon: 'success'
						});
						that.$set(that.dayArr[index], 'flag', true);
						that.$emit('change', obj.date);
					}
				}
			},
			// 初始化日期
			initDate() {
				let that = this;
				that.dayArr = [];
				// 当前月总天数
				let totalDay = new Date(that.year, that.month, 0).getDate();
				// 遍历总天数将日期逐个添加至数组
				for (let i = 1; i <= totalDay; i++) {
					// 得到需补充天数
					let value = (new Date(that.year, that.month - 1, i)).getDay();
					// 补充前面空白日期
					if (i == 1 && value != 0) {
						that.addBefore(value);
						that.aheadDay = value;
					}
					// 添加本月日期
					let obj = {};
					obj.date = that.year + '-' + that.formatNum(that.month) + '-' + that.formatNum(i);
					obj.day = i;
					that.dayArr.push(obj);
					// 补充后面空白日期
					if (i == totalDay && value != 6) that.addAfter(value);
				}
				
				// 解决月份切换后，已签到部分不显示的问题（感谢社区网友提供的方案 @w的多多）
				this.getAlready();
			},
			// 补充前面空白日期
			addBefore(value) {
				let that = this;
				let totalDay = new Date(that.year, that.month - 1, 0).getDate();
				for (let i = 0; i < value; i++) {
					let obj = {};
					obj.date = '';
					obj.day = totalDay - (value - i) + 1;
					that.dayArr.push(obj);
				}
			},
			// 补充后空白日期
			addAfter(value) {
				let that = this;
				for (let i = 0; i < (6 - value); i++) {
					let obj = {};
					obj.date = '';
					obj.day = i + 1;
					that.dayArr.push(obj);
				}
			},
			// 格式化日期位数
			formatNum(num) {
				return num < 10 ? ('0' + num) : num;
			},
			// 上一个月
			lastMonth() {
				let that = this;
				if (that.month == 1) {
					that.year -= 1;
					that.month = 12;
				} else {
					that.month -= 1;
				}
				
				that.initDate();
				if(this.year >= new Date().getFullYear() || this.month > new Date().getMonth() + 2) {
					this.prv = true
				}else {
					this.prv = false
				}
				
				if(this.year <= new Date().getFullYear() || this.month < new Date().getMonth() ) {
					this.next = true
				}else {
					this.next = false
				}
				
				
				
			},
			// 下一个月
			nextMonth() {
				let that = this;
				if (that.month == 12) {
					that.year += 1;
					that.month = 1;
				} else {
					that.month += 1;
				}
				that.initDate();
				
				if(this.year >= new Date().getFullYear() || this.month > new Date().getMonth() + 2) {
					this.prv = true
				}else {
					this.prv = false
				}
				
				if(this.year <= new Date().getFullYear() || this.month < new Date().getMonth() ) {
					this.next = true
				}else {
					this.next = false
				}
			}
		}
	}
</script>

<style scoped>
	.calendar-box {
		width: 100%;
		flex-direction: column;
		justify-content: center;
	}
	
	.miss_box {
		width: 90%;
		padding: 20rpx 40rpx;
		box-sizing: border-box;
		background: linear-gradient( 180deg, #C6E8FF 0%, #FFFFFF 17%, #FFFFFF 100%);
		box-shadow: 0px 2px 16px 0px rgba(0,149,248,0.16);
		border-radius: 25rpx;
	}
	
	.calendar-box,
	.month,
	.week,
	.day {
		display: flex;
		align-items: center;
		justify-content: space-between;
	}
	
	.month,
	.week,
	.day {
		width: 100%;
	}
	
	.month {
		margin: 30rpx 0;
		position: relative;
	}
	
	.picker {
		width: 160rpx;
		height: 40rpx;
		position: absolute;
		top: 20rpx;
		left: 50%;
		transform: translate(-50%, -50%);
	}
	
	.day {
		flex-wrap: wrap;
	}
	
	.week>view,
	.day>view {
		width: 70rpx;
		height: 70rpx;
		margin: 10rpx;
		text-align: center;
		position: relative;
		line-height: 70rpx;
	}
	
	.checkday {
		color: #999;
	}
	
	.choose {
		color: #FFFFFF;
		border-radius: 50%;
	}
	
	.circle {
		width: 10rpx;
		height: 10rpx;
		border-radius: 50%;
		position: absolute;
		bottom: 10%;
		left: 50%;
		transform: translate(-50%, -50%);
	}
	
	.sign {
		background-color: #FFF;
	}
	
	.repair {
		background-color: #FFF;
	}
	
	.but {
		display: flex;
		flex: 1;
		margin-top: 80rpx;
		justify-content: center;
	}
	.but button {
		width: 650rpx;
		height: 80rpx;
		line-height: 80rpx;
		border-radius: 30rpx;
		border: 1px solid transparent;
		outline: none;
		color: #FFFFFF;
		font-size: 32rpx;
	}
	uni-button:after {
		border: none;
	}
	
	.top {
		display: flex;
		width: 100%;
		justify-content: space-between;
		padding: 30rpx;
		box-sizing: border-box;
		background-color: #FFFFFF;
		border-radius: 20rpx;
		margin-bottom: 16rpx;
		align-items: center;
	}
	.top h4 {
		font-weight: 600;
		font-size: 36rpx;
		line-height: 50rpx;
	}
	.top h4 span {
		color: #0095F8;
		margin: 0 10rpx;
		font-size: 32rpx
	}
	.top p {
		font-style: normal;
		font-weight: normal;
		font-size: 28rpx;
		line-height: 40rpx;
		color: #0095F8;
	}
	
	.rig span {
		font-style: normal;
		font-weight: normal;
		font-size: 24rpx;
		line-height: 48rpx;
		color: #0095F8;
		border: 1px solid #0095F8;
		padding: 10rpx 20rpx;
		border-radius: 32rpx;
	}
	.month .prv {
		min-width: 35px;
	}
</style>
